0

我添加了一个简单ListSelector的ListView. 问题是，ListSelector仅在 ListView 滚动一点后才显示。

如何使ListSelector选择时立即出现？

列表显示

<ListView
    android:id="@+id/contentListView"
    android:layout_width="fill_parent"
    android:layout_height="0dp"
    android:layout_alignParentLeft="true"
    android:layout_alignParentRight="true"
    android:layout_alignParentTop="true" 
    android:layout_above="@id/buttonEntwerten" 
    android:scrollingCache="false"
    android:cacheColorHint="#00000000"

    android:listSelector="@drawable/list_selector"
/>

@drawable/list_selector

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
     <item android:drawable="@drawable/list_selector__gradient_bg_hover" />
</selector>
4

1 回答 1

-1

您可以查看 android 是如何配置它的，并进行相应的更改（文件名为“list_selector_background.xml”）：

<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:state_window_focused="false" android:drawable="@color/transparent" />

    <!-- Even though these two point to the same resource, have two states so the drawable will invalidate itself when coming out of pressed state. -->
    <item android:state_focused="true"  android:state_enabled="false" android:state_pressed="true" android:drawable="@drawable/list_selector_background_disabled" />
    <item android:state_focused="true"  android:state_enabled="false"                              android:drawable="@drawable/list_selector_background_disabled" />
    <item android:state_focused="true"                                android:state_pressed="true" android:drawable="@drawable/list_selector_background_transition" />
    <item android:state_focused="false"                               android:state_pressed="true" android:drawable="@drawable/list_selector_background_transition" />
    <item android:state_focused="true"                                                             android:drawable="@drawable/list_selector_background_focus" />

</selector>

简而言之，您只需要处理 state_pressed state 。其余的也是可以处理的好状态。

您的代码中的问题是它没有状态。

于 2013-08-13T10:18:12.433 回答